Remarks

In normal dungeons, rare monsters have approximately a 2-5% drop rate based on player experience. The rate may be slightly higher for harder difficulty tiers. For end game bosses, the estimated drop chance per difficulty is: Mythical 100%, Legend 100% ( 40% If a Mythical Dungeon is available ), Master ~40%, Expert ~5%, Adept ~2%.

That's assuming RNGesus is merciful and gives you a normal drop rate. Apparently some people in the comments are getting pooped on. While others play the dungeon once and find two dozen Naga's in their Monster Box.

Hence my quotations around the 20%. I'm only going off of what the site says. Doing anything otherwise would just be pulling numbers out of my ass.

And yes, you could feed 15-20 times and not get a skill up. You could also feed 27,492 of them and not get a skill up. Or you could feed 5 and get 5 skill ups. This is a probability. Not trading in tickets for a teddy bear at an arcade. Your stamina doesn't guarantee you anything.

It's a statistical estimation. I don't understand how people don't get that. Just because you may have had a bad experience, doesn't mean that others' results are invalid and that you have the correct perception.

You alone are just one person. You could play this game more than anyone in the world, and you still wouldn't be a large enough sample size to accurately determine the true probability of anything. We only go off of what information we have.

Personally, I recently fed 7 Super Shimonita Konjac's and 16 Super Tsumagoi Cabbage's during a x2 skill up event and got 2 skill ups and 3 skill ups, respectively. Now does that mean my experience gives anymore validity to the statistics we already have? Not really. A bit, yes. But my sample size is no bigger than anyone else's. I don't base probability on my results alone. That would be stupid. My point here is that not everyone has the same experience as you.

And regardless of everything above this sentence, humans have a pretty large negativity bias. I'm sure there have been times when you got more skill ups than you deserved, and I'm sure you were just peachy about it. But you don't go around on the forums eager to tell everyone about your recent fortune now, do you? Of course you don't. Why would any human feel inclined to complain about getting more than others got? You got less than the average. You feel robbed. Obviously you aren't going to have a problem with having good luck.

Ok so apparently it was 2x drop rate even though it wasn't listed at first. Which means that it should've taken me about 63 runs/938 stamina to get 5 skill ups. I got quite a bit luckier. But yeah.

I kept track of my Naga farming over the last day and a half. Here are my results:

When I started, my CLM Echidna wasn't skilled up at all. I did the dungeon 40 times before I got skill up max. Throughout I got 21 Naga's. The majority of them (I'd say ~75%) dropped from encountering them before the last floor. When I did find them on floors 1-4, they drops about half of the time. But I think it was an equal drop chance for anything on the same floor. I may have just got lucky. A lot of them came on the first floor. And the first floor seems to only have 2 monsters more than any other. There were multiple times I got two drops in once dungeon! And once I got three :D

When I first started doing the dungeon, I got much better drops than later on. So the first time I did skill up fusion, I fed 5 at once. I think that's the way to go. Each time I did 5 at once, I got two skill ups. While I don't think that the chance changes at all by doing so, it definitely feels better to feed 5. You are pretty much guaranteed one skill up. When you feed the Naga's as soon as you get them, one at a time, it just sucks because it feels like you NEVER get skill ups. On top of that, if you are feeding one at a time, you're probably not getting very good drops (as I did for a while after my first lucky spree). So I suggest saving them until you have 5 to feed at once. I used 2 stones to restore stamina on the first day (just because I knew I'd have to use some eventually), and none on the second. I leveled up 3 times throughout. So I had a decent amount of stamina. I used exactly 600 stamina total. Statistically, I got a bit lucky with skill ups and drops (although not far off from average). Also I got 6 plus eggs, but that's irrelevant.

So overall, I got about ~35% better success than I should have. I hope you enjoyed my unnecessary wall of text.

I guarantee u the last floor is NOT 20%. Most of the nagas I got from this were from stages before the last floor. the 20% in this game is just like the skill ups: you can feed 15-20 skill ups and you will get 0 skill ups lol.

Thanks for the long lecture and sorry if I offended you br0. I was just stating my bad experiences which is a lot of crappy rates for my account. The only good rate I successfully skilled up something was vampires. Everything else took 40-50 to get 5 skill ups during 20%. These are the skill up materials that requires me to farm fodders and materials to feed it. Yeap, I totally believe my account is cursed :D. Until I hit a lucky max skilling something 1/5, I'll continue this superstition :(

Your argument would be valid if their were times when I got multiple skill ups, drops, etc. in batch runs. I only ever get strings of failure.

Twenty skill up attempts or fifty runs through a dungeon are adequate sample sizes to see the results match the chances, within a small margin. The stated probabilities are wrong or Gung Ho doesn't use a RNG without conditionals and modifiers.

Boss Synched calculation:3957*.5*(2+.2) = 4352.7 <- HP Limit?Auto-heals in _3_ turns, but they're on a 2 turn timer so if you didn't kill one with Odin & BAO or Odin & Kelpie, then you'd better heal a little after all 3 synched hit you.

Floor 1-4:On any floor with 4+ synched mobs it's probably worthwhile to Odin blast one. Other than that, just grind. the Kelpie can make the boss much faster if you happen to have the poring and kelpie (assuming your odin is coming from a friend).

Odin & 1 BAO blast if your BAO is like level 50+ should kill one of the 3 bosses (so you won't even have 3 synched) or at least get one into easily killable range. Same thing for Odin & Kelpie.

Good luck with drops in addition to your S-rank 'cause I know EVERYONE needs more nagas for skillups, always =p

guys if you're planning to mass farm naga for skill up, do it on the last day of the dungeon period, in which most likely it'll be 2x drop rate, and prepare to stone hard like a mad man.

And don't be fooled by the 20% skill up rate rumor during 2x skill up days, the actual skill up rate is definitely less than 10% even on the 2x period. So be prepare to farm for 60 of them if you want to make sure that you can max skilled her.

my rate is slightly worse than yours.. used probably around 200 stam and i've gotten 5 drops - 3 from final boss and 2 from random spawn. My drops were rather streaky. I got 3 in a 1 hour stretch, then 2 in the last 3 runs..

and if anyone is looking for the red devine mask, this dungeon drops a ton. i can never get them to drop in the weekday dungeon, so i'm keeping all the ones i've been able to stock pile here.

I'm assuming that someone changed the time on their device and saw a x2 drop rate for tomorrow. NOTE: all drops are regulated by Gungho servers so there wouldn't be a way to change your time and manipulate dungeons... just guessing that the client side of the game would reflect unaccurate notices if you change your device settings

Dropped 330 stamina into this dungeon [22 runs), got 12 drops (incl. 2 double drop runs) and all five skillups. The first 10 runs were from free stamina without stones. One drop, no skill ups.

But once I spent a stone for a stamina refresh, everything shifted. so in 12 runs, I had 11 drops, and got all five skillups. Has anyone else seen a noticeable increase in drops/skillups once you spend a stone on something? Or is this a false correlation?

Nope. I have run this about 80 times now with an average of 1 drop in 5 runs. The last 13 didn't get me a single skill up. In the first few runs I got 5 and got 2 skill ups.

Update: Ran it 15 more times, got 5 drops and my last 2 skill ups. I wish I didn't waste so many stones on this. I'm going to be farming +'s for the rest of the day. Hopefully drops are not as bad as this dungeon.

For those who just started the game, I recommend owning two echidnas and the rest of them use as skill ups. One of the echidnas will be used as your main echidna while the other is used for the conditional dungeons that has cost restrictions (2nd form)

I think it's 20% per, but I'm not sure. I'd save for double skill up events, especially since menace skill ups are so difficult to get. On average, it should take about 25 Naga's to max skill an Echidna during 2x events (50 without the event), so I'd say it's difficult to max out. She's a pretty amazing spike team sub for doing descendeds.

thanks! i think i'll collect as many nagas as i can and wait til the next 2x event to skill up as you suggested.. probably will take me a few of these naga special events to eventually max level echidna though. i'm close to being able to attempt legendary but not there yet so i'm not in a huge rush to max skill her.

i guess i'll just have to make some space or buy more.

I just ulti evolved my Cu Chu and will have a pretty good balanced spike team.. then maybe work on a dragon team and a valk team.. all of which echidna would be a pretty good member of (i think).

I hope I get a Naga..... way when I first started, I got 2 Nagas.... one from the int version of this and one from the normal dungeon in Volcano Vulcan.... I threw them both away along with my BAO Robin and my Dragonette, thinking they weren't rare. Now in my monster book, it says I have them, but I haven't gotten any of them since.

i've been trying to max skill my Echidna for what seems like forever... and now i finally have the stones and stamina to make a serious try for it. sooooo... some quick stats:

it took me 24 Expert runs to get 10 drops. (approx %41 drop rate... even though it felt infuriatingly like ~%10 ;) however, of those 10 drops, only 3 were Lv.8 (from EoSE / floor 5)... so statistically speaking, you are apparently more likely to secure drops from randomly generated Naga on Floors 1-4.

which, i guess, doesn't mean much, except that if you don't pull any and then get killed on Floor 5 for some reason, you shouldn't cry too much ;D

What is the deal with this? I've done it close to twenty+ times over the last two days and I haven't gotten one to drop since the first two runs. Last five or so runs I haven't even encountered a Naga. That's looking at a sub 10% drop rate. What a disappointment of a dungeon...

I ran this dungeon at least 50 times this weekend and only got 2 from boss level. That is a 4% drop rate, no where close to the said 20%. Since 50 is a pretty good sample size here, your game doesn't follow the rules of probability, freaking BS!

If I have been able to run Hera this last time, should I be able to run this? I do not have a siren as she refuses to drop for me in this game despite despite spending weeks farming Sea Cave mercury and others, but I digress. I'd love to be able to start skilling Echidna up. I have a Valk, but she is not evo'd yet as I just got her during the last godfest. I have the Qiao sisters as well as Haku for burst; would that be a decent lead if I ran Odin or maybe even Siren on the other side, perhaps? I don't have a very good max evo'd blue lead (though I do have a fenrir knight, which I would definitely bring). Thanks! :)

Back when I didn't really want her, just the stone I got 2 of her in 1 run. Now that I actually use her and am trying to skill her up the last time she came around I only ran her dungeon for the 2 days she was available and I didn't get a single one. Better luck this time I hope.

I cleared this dungeon today about 6 times on Expert...AN ECHINDA EGG DROPPED ON MY LATEST RUN! ....... except on the score summary screen, it ended up being a Naga...and was even placed in my monster box as a Naga.

Just adding my run stats for this dungeon during the x2 drop rates - I'm level 223 with 128 stamina and non-IAP player - used three stones and ran this dungeon appx 30 times - got 22 nagas - was only able to skill up 3 times - can't complain but wish i could've maxed my echidna...at least the stones were a gift ftom gungho for the iOS troubles - would never have bothered trying to skill up my echidna otherwise

I think it'd be an absolute waste for non-IAP players to try and max skill their echidnas and run this dungeon when its not x2 - just wait until the x2 comes around again

Whenever that dungeon comes around I use all my stamina for that one. Got two nagas using 112 and 113 stamina (yes I tipped of my exp yesterday so I can level up here). I will use my thre stones tomorrow if 2x droprate and hope for 10 nagas. No sweeter pain than feeding 2x5 nagas to echnida for ZERO skill ups like last time the dungeon was here. I am almost level 200 and can't run so many dungeons that require max skilled echnida. Mine is still skill level 2 after playing for almost two years.

The Kapibara-san Collab landed me a nice new way for S-ranking this one.

Shining Lance Wielder, Odin4 one star monstersUttorin White-San

The Uttorin has "2.5 ATK when Dark, Wood & Water attack" leader skill to help clear pesky demons and a "Void fire damage for 3 turns" active to help survive while killing off synced Echidnas. Just make sure to have both actives up before Floor 5.

I read a tip somewhere saying: "Level up your Naga before you feed it"! Of course it might have just been luck, but I fed 5 Nagas each time, all around lvl 20. First 5: 1 Skill-Up, second 5: 0 Skill-Ups, third 5: 1 Skill-Up: fourth 5: 3(!!!) Skill-Ups

Spent 2 Stones for Stamina refresh and had one Level-Up inbetween. It's definitely doable, hang in there if you had some bad luck and try levelling up your Nagas a bit before you feed them.

Primarily rarity. Typically if you run 2 six star or lower leads and a few one or two stars you can hit it on rarity alone. Combos and fewer turns to clear help too but not nearly as much unless you are hitting 8-10 combos. tamadra site shows you exactly what you need for each dungeon to hit s-rank.

Spent two days worth of stamina trying to farm naga for skill ups, the skill up rate is also currently at 2.5x, and only managed to skill up once! JUST ONCE! 20% drop rate is just to low and when they do drop u have to deal with if it will skill up :(

Just fed my Echidna 7 of her children. I got 5 skill ups.Now, this is slightly balanced by the fact that I didn't manage to get a Hera-Is last night (gorram friend with Abyss Neptune not logging in until less than an hour before the dungeon ended), but still, BOOYAH!

Apparently this is the most useful monster in the game. If we ever have the 2x drop rate, some people may even spend stones to refill stamina just to get as much naga as possible for skill ups. Personally I think that is overkill, but it is an option.

I just leveled Ult Evo Echidna from Lv2 to max; took me 3 hours (at work lol), spent two stones. I think there are some tricks I can share, although I don't know if it would work for everyone.

1) Play expert, when it's drop x2 ONLY

2) Use a powerful team; I found that, when Echidna appeared (either randomly on any F or at 5F), if you can combo well or hit it just really hard, it's 85% drop; there's a few times I got two Echidna in one playthrough

3) I don't just feed her right away. I leveled the material-Echidna to about level 18-22 or even max, and then feed to the one I needed to max-skill. First time I gained 2 levels, second time gained 1, third time gained 0, and fourth time gained another 1 and max her out.

4) The lower level the main Echidna is, the easier to level up. I'm planning my 3rd one, and I'm planning to max her skill first before even evo her to the 2nd form.

You fed one echidna to another and got two skill ups out of it? Sounds like a dream.

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By waldo: S Rank build. Levels were 39/6/1/1/1/99. Hino friend max awoken but no plusses. Hino one shots every floor except if there's a mask. Stall on masks when given the opportunity but make sure you kill them before they attack. Save red and dark orbs in the corners to use for TPAs on the boss level.

By Summertime: S RANK! on rarity alone. Just need decent spike leader and chibi Isis or DQXQ with 1 star subs. Decent RCV lets you stall, but no skills necessary. With 4k HP you can tank a hit from 1 of the bosses

By Tonod24: S-Ranked. Target synced monsters first and watch health. Heal when possible. If you come across mask, take everything out and charge up skills on mask. Ogre leader skill will keep you alive. Boss level: Ice Ogre and Kelpie Freeze Strike for instant KO.

By greml1n: Well, I finally figured out how to S rank this dungeon... I _think_ you can s rank with two fire nuke ogres on the team, but I did it with just the one as a leader, so I didn't test the "safe" version... That said, work through the dungeon make sure the ogre is ready for boss, nuke the 3x bosses and then combo for the win.

By Nick SA/PG: S Rank build. Firefly, Pixie max level, friend's Odin max level, fully awoken, +287. The hardest level is the last. If Echidnas are synced, you take 4352 damage: two autoheals and a heart match. If not synced, you take 2374 from two hits and 396 from one. Odin brings one down to 25%. Once you're down to two, it's smooth sailing.

By Jordansaur: Luxury farming build. x2 Valks defeat every monster in just one 3 Light combo. Possible death if all 3 Echidna attack at same time, but can surive two hits and heal up fully for next one with high rcv. Subsitute whatever for last two slots, I used Shynee and Venus for more Healer damage. Siren and one valk Max skilled.

By PYF: Time depends on the amount of attack your team has. RCV should not be a problem if your attack is high. Echidna is only there because of stalling if needed. overall, as long as you have double batman leaders and fill in dark subs, you're good to go.

By Punx: Medium levels, lowest 18 highest 45. This team depends entirely on how well you match orbs. It was the first expert dungeon I attempted and succeeded. Wasnt hard at all as Kirins skill was activated a lot.
Gigas + Verche were used for orb changes. Others are replaceable by same color monsters

By Cherri: Double 50% fire defense provides good defense, the green orb to heal orb is defiantly helpful if you suddenly run out of heal orbs. Charge Snow Globe and Echinda's skills before the end. Wild card can be any monster with 1800+ HP I used Homura. Mystic Ice knight can be replaced with a water orb changer.

By Nick: Quite simple double commerce deity hermes for 4x attack and hp
stall if you can to at least get fernir knight for boss and one shot everything else with a water match
Ice samurai and Cad can clear waves or help out on boss fight if needed, very quick build

By Crome: Simple and non expensive build. Leader reduce dmg, friend heal each round. Ice Ogres could be replaced with anything making some dmg. If you just Play through you can kill last 2 rounds with just using skill ;-)

By gleasmoney: Time can vary depending if you want to powerhouse or wait and charge skills with a lead that lessens 30 percent the echinda did only about 2500 the CDD DDK can be switched for anything with a good skill blue dragons and there evolutions are really good due to double damage. Use a friend healer preferably max siren for support.

By ShwqaSA: A non-IAP team. Just fill the 2 other spots with anything but focus more on higher attack. With 2 fire to heart skills you should never run out of health.

Suggest a buildNote: Stones and estimated times are still based on monster level, monster skill level, individual player skill, initial orb spawn and luck. Due to these factors, down votes have been disabled for the original poster.

Stone = Estimated number of stones to clear this dungeonTime = An approximation based on each individual build

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